NEW MHZ mystic 114 /lehner 2240/8

[metalsak]

Hi guys!! A new catamaran for me,as my previous hpr c5009 have a sim crack,after a big flip.
So the boat comes with the follow set up:
1)mhz bueletproof mystic 114
2)H.S drives from mhz
3)original rudder from mhz,with some diferent levers for direct servo movement with no gaps.
4)swordfish 8s 200amps controllers
5)mhz servo mount
6)3s 1100mah to feed the castle B.E.C
7)handmade battery trays from 2,2mm carbon
8)lehners 2240/8 hiamp/lk with 8mm shafts and thrust bearings (ezo f8/16 no race)
9)homemade clamp system for fast out and entry the motors in the hull with 3 screws,and together with the collets.(1minute per motor)
10) 6s /7s 1p per motor hyperion45c and nannotech65/130c (but i need more powerfull batts)

Now as the boat have the same set-up with a friend here,named klaus,i need some help on the trims,as the boat is unstable on 7s....
will folow with photos ,and measurements,of the boat.
thanks Stelios.

[metalsak]

8036480365803668036780368those are before 2weeks that whas complete,and ready for the first test

[metalsak]

803728037580376 drives adjustment......2mm when the boat is pushed down to table(2last steps when boat is pushed)

[metalsak]

some more info......
total weight with gps and ready to run...(two options from batterys)
1)5s+2s per motor total 7s 1p hyperion 45c total weight 7,745 gramms
2)7s per motor nannotech 65c total weight 7,779 gramms
803785+2s per side (2s on tunell with velcro) 80379 7s monoblock on each side

[metalsak]

the things inside with infos in mm,from the back end of hatch....80380with battery full back 80381
80382batterys full front80383measurement from back to full front batterys.

[metalsak]

803848038580386the centre of cravity with the batterys back or front

[metalsak]

NOW..... where you see the problem here????(video)i think is the drives too negative???
i run 7s with the batterys back.....the drives as you see them in photos 2mm.....and x457 reduced to 50mm
i always run props to the outside(see photo)
https://youtu.be/B4wczXvWnts 80387

[metalsak]

sorry but because i dont speak german,i see some answers,but i cannot opened them to see........heeeelppppp......
my moves on this forum is not experienced,so forgive some more questions.

[metalsak]

here is no problem as i use 6s and x447 that gives a boat stable....

https://youtu.be/DUWCF3xOr9I

[carphunter]

Hello Stelios,

the pictures looks good for the first view. We have the same Setup but not the same hardware. I have the old drives (round and 1,5 cm shorter). My esc are from Modellbauregler 4-8S and 200 A. My high speed runs with 6 or 7S was with special props. These props need an extreme negative attitude and can not be compared with Octura props.You simply have everything check and try different settings.

1. Drives 100% parallel.
2. Rowing vertically.
3. Swordfish full throttle (EPA set to 80 % , teach full throttle and then make full EPA to 120 % or more).
4. Prop to the outside is ok.
5. Center of cravity 31-33cm or drives more negativ.
6. Testing, Testing, Testing

greeting
Klaus

PS I hope you understand my bad english.

[metalsak]

hi Klaus!!!!!
please do not worry about yours english,is not also for me ,and for you, our mother language,but i do believe one photo is 1000 words.

now about yours recomendations...
1)100% paralel i will try for sure!
2) sorry.....dont understant
3)i have futaba 4pk is easy to do that way!
4)many thanks here.......it whas my bigger worry!!!!
5)here tests-tests.......
6)tests is o.k so i do from start with parallel drives...

props i have they are.....
octura x457 reduced to... 47 / 48 / 50 / 51 / 52 / 53cupped
octura x447 reduced to 45
octura x447 detounced
octura x447 normal
octura x447 cupped
octura x447 bended
octura x450/3 detounced
octura x450/3 milled to 46 (loose the one,wait the sister of her)
mbp cnc 43,5
propshop 50/2/1.8
propshop 50/3/1,7
propshop 45/3/1,7 (one is broken wait the sister of her)

the props with line
is the best of my tests...
Iwill informe you,for all my new tests!
Thanks a lot,is very good to have someone to "show the road" to me..
all the best,Stelios.

[carphunter]

Hello Stelios,

2. Install rudder verticaly and is better for Highspeed-Setups over 160 Km/h if the rudder blade is slightly tilted backwards (10 - 15 ° ) . It must also be free from play .


greeting
Klaus

PS my rudder is a knife blade, is not so thick.

[metalsak]

Klaus,very interesting blade.....i can make one in future from spring steel (stainless) as i have in my workshop...i let you know on this.
also yours drives,are nice!!!!
Thanks a lot for info!!!!!

[metalsak]

also you are right for the free play of the support of rudder......once before 2 years,i have a loose screw on the hpr i own,and the boat cannot get stable.....crazy!!!!!

[carphunter]

Have I done with the wedge shape of a blade . Is only half as thick as the original.
Bring a few kilometers per hour.

greeting
Klaus

[metalsak]

what i can say for the knife.........(thriller set up).....hehe....good idea the knife!!!!
i will inform for the spring steel metal that i have in my shop..(stainless steel)
is from coil,comes out as a sheet metal,and you can cut it with angle grinder or with laser
only high cobalt drills,and low speed cutting on the drill....here on photo is a 1mm thick of this steel,on my race hydro(vampire)
accidentaly i hit a catamaran,and the catamaran opens....the fin whas there,in its original shape!
when bends,is coming to his original shape again....80429

[carphunter]

It's all right if you have the ability to manufacture its parts itself :jaw:.

greeting
Klaus :prost:

[metalsak]

Hello guys,hello carphunter...
A crash with the boat,destroys the one drive.
The boat is in perfect condition,(lucky)
New drives have received from MHZ and needs rebuilding,and be good paralled.
it whas a long time with swimmers at our driving bay,so new trials-tests will come.
Many Thanks!
Stelios

[metalsak]

Hi guys!
After crash,drives whas destroyed...so new drives (hs) comes from MHZ
New drives comes with diferent cad so the hubes must change,as the angle whas extreme negative even in zero.....
I make two new hubes,to have the ability to go on zero,if i spin the props to inside in the future.
some photos.....82729
8273082731

[metalsak]

some more.....827328273382735

So now all the trims will start from the start....!!!!
weather is still good,and swimmers is out of the sea.
have a nice evening! Stelios.

[metalsak]

Hi modellers....
I have long period to write something,as my daily job keeps me out of my hobby.
Some good news on this mystic.
I make some huge changes on the prop rotation,and on the rudder....longer rudder is magic when drive props to inside!!!!
Two very good speeds with big props.
First video with 2x 7s (1850kv lehners 2240/8 as always) and x457 milled to 54!!!! 165,4km/h and i whas extreme nervous that something bad will be happen....and you can hear me on the video.....i wait for explosion,but finaly work very grate.Need to hold full throtle more,for more speed....
https://youtu.be/zrs5B2fuWNw?t=3

On the next video again with same props and heated lipos i drive more with full throtle.....the speed whas very impresive!!! 180,8kmh

https://youtu.be/LWrAvIjX1qk?t=4

[metalsak]

The days that we make the long rudder tests,in a small place,and small props....
https://youtu.be/QVRSI9gFJpQ

and some photos......
90942
90943
Also big stability comes from Mhz H.S drives,but needs to be close on zero angle...this cant be happen with original drive holders....I whas lucky to make my own holders from the start of my build.
Thanks carphunter for yours help and recomendations!!
In future i will try to hit more speed,and as the 2240 motors comes to their limits,two 2250 is on the way to be here.
Thanks,Stelios Sakantaris.